258 : RHYNCHOPHORA. 
a’. Prothorax about as long as broad ; elytra concave at base, without 
transverse depressions; antennal club very elongate. . - . + + comma, Schonh. 
b'. Prothorax broader than long; elytra flattened and with shallow trans- 
verse depressions ; antennal club oblong-ovate, shorter . . . «+ - madaroides, sp. 0. 
6. Third elytral interstice with an oval or oblong, ochreous or white, spot at 
the base. 
c'. Elytra sharply striate throughout ; antennal club oblong-ovate. 
a®, Metapleura and sides of first ventral segment each with an ochreous 
spot. . . . ... Coe ee ee ew ew ee glhabripectus, sp. n. 
b*. Metapleura only with an oblong ochreous patch . . . - . ~ ~ subulatus, sp. 0. : 
c’, Pro- and metapleura, prosternum, and sides of first ventral segment 
with ochreous or white spots . . . . e . . “as . sguamipectus, sp. 0. 
d’. Pro-, meso-, and metapleura, and sides of abdomen, with a coumplets 
or interrupted white band, extending across the prosternum ; pro- 
thorax rounded at sides. . 2. 2. - ee ee ee ee ee Ctrcumlineatus, Sp. 0. 
e’, Pleura and sides of abdomen bare. . . . longipennis, sp. D. 
da’, Elytra with the sutural stria sharply defined, the others faint or 
obsolete; pro- and metapleura, and sides of second ventral segment, 
with white spots; antennal clubelongate . . . 1 8 fs lissonotus, sp. 1. 
c. Third elytral interstice and under surface bare: body more re clouigate, and 
legs longer; antennal club elongate . . . . . . . « + « « « glabratus, sp. n. 
1. Cylindrocerus comma. (Tab. XIII. figg. 24, 244, 3.) 
Centrinus (Cylindrocerus) comma, Schéuh. Cure. Disp. Meth. p. 311°. 
Cylindrocerus comma, Schénh. Gen. Cure. viii. 1, p. 261%. 
Cylindrocerus signum, Boh. in Schéuh. Gen. Cure. iii. p. 790 (nec Fabr.) *. 
Oblong-rhomboidal, somewhat concave above, black or nigro-piceous, shining; an attenuate stripe extending 
down the basal two-thirds of the third elytral interstice, an interrupted series of spots and streaks along 
the sides of the body beneath, a transverse patch on the middle of the first ventral segment in the ¢, 
and a spot between the anterior coxe (), or a broad space down the middle of the prosternum ( 9), 
densely clothed with oval, ochreous or yellowish-white scales, the rest of the surface almost bare. Head 
finely punctate ; rostrum longer than the head and prothorax, stout and coarsely punctate to the points 
of insertion of the antenne, then becoming slender and smoother to the tip, the apical portion abruptly 
narrower and impunctate in the 9, the antenne inserted far beyond the middle in the ¢, and at a little 
behind the middle in the 9, the antennal club greatly elongated and nearly as long as the funiculus in 
both sexes. Prothorax subconical, about as long as broad, almost smooth, the anterior lobe with a few 
fine punctures. Elytra triangular, very little longer than the prothorax, transversely depressed on the 
disc anteriorly ; sharply punctate-striate, the interstices almost flat, the third closely, minutely punctate 
to beyond the middle. Beneath very sparsely and minutely, the sides and the squamigerous portions of 
the surface closely and rather coarsely, punctate. Prosternum bifoveate in the anterior constriction. 
dg. Prosternum armed with two curved spines of variable length and with a deep circular cavity between 
them ; ventral segment 1 with a shallow transverse squamigerous depression ; anterior tibiw strongly 
ciliate within from about the middle to the apex ; anterior tarsi hairy beneath and dilated. 
Length 4-54, breadth 1,9,—2,%; millim. (d 2.) 
Hab. Panama, Tolé (Champion).—SoutH America, Cayenne and Brazil 2°, 
The typical form of this insect has been found in abundance at Tolé; the vars. @ 
